Improved compound for forming cores for moulding iron



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JOHN 1. VINTON, OF ALTO ONA, PENNSYLVANIA.

Letters Patent No. 89,187, dated April 20, 1869.

IMPROVED COMPOUND TOR FORMING CORES FOR MOULDING- IRON, 8w.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern;-

Be it known that I, JOHN I. Vmron, of Altoona, in the county of Blair, and'State of Pennsylvania, have invented a new and improved Gore Compound; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same.

This invention relates to a new and useful improvement in material for making cores in iron and brass foundries, and for all purposes for which cores are used informing metal castings, and consists in a compound formed of the ingredients hereinafter named, combined as described.

In the manufacture of cores for foundry purposes heretofore, a large quantity of flour is used, with molasses, sour beer, or similar liquids, in combination with loam or sand. This makes not only an expensive core, but a very unsafe one, unless the ingredients are combined in their exact proportions.

A large percentage of worthless and imperfect castings in foundries is caused by improperly-made cores.

Being practically'acquaint-ed with the subject, I have made numerous experiments with various substances, with a view of discovering a compound for cores better suited to the purpose than any heretofore used, and

scribed.

especially with a view of avoiding the use of flour, molasses, and other expensive ingredients.

In carrying out my invention and forming my core compound, I make use of the following ingredients, in about the proportions named, with the most satisfactory results, viz:

Olean sharp sand, twelve parts.

Common moulding sand, four parts.

Goal dust, two parts.

Horse manure, five parts.

The above ingredients are mixed in a solution of clay, to the proper consistency, when the compound is ready for use. The proportions will, of course, be-var ried to suit the various sizes and shapes of cores used.

My improved compound can also be applied as a facing for iron castings.

Having thus described my invention,

I claim as new, and desire to secure by Letters Patent- A core compound, for foundry purposes, composed of the. ingredients above named, substantially as de- JOHN I. VINTON. 

